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HOME > Javascript Tips & Tricks : การใช้งาน JavaScript ร่วมกับ Form > JavaScript Add/Remove Item in ListMenu/DropDownList

JavaScript Add/Remove Item in ListMenu/DropDownList

JavaScript Add/Remove Item in ListMenu/DropDownList เป็นตัวอย่างการ JavaScript ในการ Add/Remove Item ใน ListMenu/DropDownList

add_remove_item.html

<html>
<head>
<title>ThaiCreate.Com Tutorial</title>
</head>
<body onload="addOptionAll()";>
<form name="frmMain" action="" method="post">
<script language="JavaScript">

		function addNewOptions(selectbox,text,value)
		{
			var optn = document.createElement("option");
			optn.text = text;
			optn.value = value;
			selectbox.options.add(optn);
		}
		  
		function addOptionAll(selectbox){
			addNewOptions(document.frmMain.ddlSelect, "Green","Green");
			addNewOptions(document.frmMain.ddlSelect, "Red","Red");
			addNewOptions(document.frmMain.ddlSelect, "Pink","Pink");
			addNewOptions(document.frmMain.ddlSelect, "Orange","Orange");
		}
		 
		function RemoveAllOptions(selectbox)
		{
			var i;
			for(i=selectbox.options.length-1;i>=0;i--)
			{
				selectbox.remove(i);
			}
		}
		 
		function RemoveOptions(selectbox)
		{
			var i;
			for(i=selectbox.options.length-1;i>=0;i--)
			{
			if(selectbox.options[i].selected)
			selectbox.remove(i);
			}
		}
 
</script>
<select id="ddlSelect" name="ddlSelect" size="6"  multiple></select>
<br> 
<input type="button" onClick="RemoveOptions(frmMain.ddlSelect)"; value='Remove Selected'> 
<input type="button" onClick="RemoveAllOptions(frmMain.ddlSelect)"; value='Remove All'> 
<input type="button" onClick="addOptionAll()"; value='Add All'> 
<br>Add New Item<br>
Value <input type="text" name="txtValue" value=""> 
Text <input type="text" name="txtText" value="">
<input type="button" onClick="addNewOptions(frmMain.ddlSelect,frmMain.txtText.value,document.frmMain.txtValue.value)"; value='Add'> 
</form>
</body>
</html>

Screenshot

JavaScript Add/Remove Item in ListMenu/DropDownList

ช่วยกันสนับสนุนรักษาเว็บไซต์ความรู้แห่งนี้ไว้ด้วยการสนับสนุน Source Code 2.0 ของทีมงานไทยครีเอท

ลองใช้ค้นหาข้อมูล


	By :	ThaiCreate.Com Team (บทความเป็นลิขสิทธิ์ของเว็บไทยครีเอทห้ามนำเผยแพร่ ณ เว็บไซต์อื่น ๆ)
	Score Rating :
	Create/Update Date :	2011-06-18 17:33:55 / 2011-06-18 17:54:16
	Download :	No files

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